Parker 638 series

9 Safe
Safe Safe
Safe Torque
TorqueTorque
Torque Off (STO)
Off (STO)Off (STO)
Off (STO)
98
07-02-12-02-EN-V1215.doc / Type: 638
9.5 STO Function Test
The STO function must be tested when:
• The system is set-up for the first time. See: Commissioning
• Any component of the system is replaced.
• Any activity involving the wiring takes place.
• After all modifications to the drive system. (For example: parameter modifications, software
updates, etc.)
• Established maintenance schedules dictate or after the machine has been inactive for a long
period of time.
The STO functions test must be carried out by qualified personnel, with consideration for the required
safety provisions.
Depending upon the system configuration and application, additional or other tests may be required.
Test Steps:
STO Test Step 1
STO Test Step 2
STO Test Step 3
STO Test Step 4
STO Test Step 5
STO-TEST
Step
Action / Function
Anticipated Result
Remark,
Cause of Fault
Condition
STO-TEST
1.1
Prerequisite:
1.1.1 Safety Parameter:
STO “Power On” Test is Active
1.1.2 Control Voltage off (0 V DC)
STO-TEST
1.2
24V DC Voltage to
Terminal X11.1 and
Terminal X11.4
If the safety parameter,
“Start-up Test” – is
deactivated, then the drive
will be activated immediately
after the switch is turned on!
Test steps 2-4 can then be
performed anyway.
STO-TEST
1.3
Switch Control Voltage on (24 V DC)
STO-TEST
Step
Action / Function
Anticipated Result
Remark,
Cause of Fault
Condition
STO-TEST
2.1
Terminal X11.1 Test:
Switch off 24 V DC
Voltage at
terminal X11.1
flash
STO-TEST
2.2
Wait approx. 20 seconds Check
7-Segment-
Display
flash
STO-TEST
2.3
After approx. 20 seconds Check
7-Segment-
Display
Software-STO
control moinitoring
successful
STO-TEST
2.4
Switch on 24 V DC
Voltage at
Terminal X11.1
Hardware- STO
control function
successful
This manual was downloaded on www.sdsdrives.com
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